When time is of the essence, no other helmet will get you from start to finish faster than the S-Works TT. In order to create the fastest time trial (TT) helmet out there, we turned to the design of the S-Works McLaren TT to make a helmet that truly differentiates itself from the competition. The biggest innovation found on the S-Works TT is the patented Gill Vents that pull air into the helmet and allow it to freely flow out of the rear exhaust port. This makes for a time trial helmet that's not only fast, but will also keep you cool on the course.A fast helmet is useless if it doesn't fit well, after all. That's why we equipped the S-Works TT with our height-adjustable Mindset micro-dial fit system that provides a tremendous fit and fast transitions. This, along with our lightweight 4X DryLite webbing that won't stretch out with sweat or water, and Instrap webbing system for ultra-light construction and security, makes for a TT helmet that offers comfort over the long haul.Each S-Works TT helmet has been designed around a removable shield. This means that you get a TT helmet that's just as fast with a shield as it is with sunglasses - the first of its kind. Each helmet comes with two removable shields (Smoke and Clear) that allow for the ultimate visibility when riding in the aerobars.With our most advanced Win-Tunnel-developed aerodynamics and ventilation, the S-Works TT helmet is your best option for pure speed.